Reduction on Blynk 2.0 migration

Last month I migrated to the New Blynk 2.0. At that moment I tried to use the promo code that I got in july, but that one wasn’t usable anymore, so I paid the full amount. So I wasn’t able to get any reduction because of my spendings on energy in the old Blynk. In the last week I got a new promo code, but the purchase has already been done now. This way does not feel fair to me. Is it possible to use the reduction in any way now or in the future?